Finding the Fourth Proportional to 139,231.71, 192,152.18 and 81,842.27

Step by Step Solution

1. Step 1: Write the proportion equation
   139,231.71 : 192,152.18 = 81,842.27 : x
2. Step 2: Convert to fraction form
   139,231.71/192,152.18 = 81,842.27/x
3. Step 3: Cross multiply
   139,231.71x = 192,152.18 × 81,842.27
4. Step 4: Simplify right side
   139,231.71x = 15,726,169,840.49
5. Step 5: Solve for x
   x = 15,726,169,840.49/139,231.71
6. Step 6: Final answer
   x = 112,949.63